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Hi there,
I have a strange problem (Vray 4.3 Max 2020): An invisible vray light creates heavy noise in front of an object that is transparent (via material opacity, refraction and visibility are fine). With higher sample rates it becomes less noticeable, but it never disappears.
It is easily reproducible: Just create a plane and a vray light, set the light to invisible and give the plane a vray material with a color in the opacity darker than white. It can be seen the best with low samples (bucket 1-2) in the alpha channel (see attached image).
Can I get around this somehow? I have tried disabling shadows, disable GI, full lights evaluation, increased secondary rays bias, Sub-pixel sampling, increased local subdivs for the light, decreased noise threshold... no changes. Maybe I can work around by using refraction with an IOR of 1, which will probably increase render time. It also does not occur when using the physical material, maybe this will be sufficient as well. Can somebody test whether this still happens in Vray 5?
Thanks,
Bob
I have a strange problem (Vray 4.3 Max 2020): An invisible vray light creates heavy noise in front of an object that is transparent (via material opacity, refraction and visibility are fine). With higher sample rates it becomes less noticeable, but it never disappears.
It is easily reproducible: Just create a plane and a vray light, set the light to invisible and give the plane a vray material with a color in the opacity darker than white. It can be seen the best with low samples (bucket 1-2) in the alpha channel (see attached image).
Can I get around this somehow? I have tried disabling shadows, disable GI, full lights evaluation, increased secondary rays bias, Sub-pixel sampling, increased local subdivs for the light, decreased noise threshold... no changes. Maybe I can work around by using refraction with an IOR of 1, which will probably increase render time. It also does not occur when using the physical material, maybe this will be sufficient as well. Can somebody test whether this still happens in Vray 5?
Thanks,
Bob
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